IED DAI edit wizard doesn't use the correct stepSize from the data object

[jarradraumati]

Describe the bug When editing a DAI float value (e.g. a FLOAT32) within an IED, the edit field uses a default step size of 0.1. This is hardcoded.

https://github.com/openscd/open-scd/blob/2706f82283cc7a58a8da5ca4cb775bfec7c6b986/src/wizards/foundation/dai-field-type.ts#L129C1-L157C4

Some DAI float values have defined step sizes (and min/max limits), using the stepSize Struct within the data object. These can be smaller than 0.1.

Here is a VRtg example from the TVTR logical node, where the stepSize is 0.01:

This issue restricts permitted values when editing using the IED editor.

To Reproduce Steps to reproduce the behaviour:

1. Open a SCL file with an IED (refer to 7UT85_ICT_scd)
2. Click on 'IED'
3. Filter to IED XAT_502_M2, logical node TVTR
4. Expand down to the VRtg.setMag.f data attribute and click the edit button.
5. Enter 63.51 as the Val.
6. The value is unable to be saved.

7UT85_ICT.zip

Expected behaviour The value of 63.51 should be allowed. Values beyond the stepSize should be disallowed.

Screenshots

The error message.

Desktop (please complete the following information):

• OS: Windows 11 22H2
• Browser: Google Chrome
• Version 115.0.5790.110 64-bit

Additional context

It would be good to check if stepSize, minVal and maxVal DAIs exist in the data object and use these when rendering the edit field.

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